From 72ef8c3d6dc48b108c81e2d4ff6176fff579db5c Mon Sep 17 00:00:00 2001 From: Vito Caputo Date: Wed, 25 May 2022 19:25:19 -0700 Subject: setup: return the desc for failed setting on error This commit improves the error printed when cli-supplied args fail, adding at least the key name to what used to be just a stringified errno: ``` $ src/rototiller --module=shapes,scale=99 Shape type: 0: circle 1: pinwheel 2: rhombus 3: star Enter a value 0-3 [1 (pinwheel)]: Fatal error: unable to use args for setting "scale": Invalid argument $ ``` --- src/main.c | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-) (limited to 'src/main.c') diff --git a/src/main.c b/src/main.c index 8906327..122fdea 100644 --- a/src/main.c +++ b/src/main.c @@ -120,7 +120,8 @@ static int setup_video(til_settings_t *settings, til_setting_t **res_setting, co /* turn args into settings, automatically applying defaults if appropriate, or interactively if appropriate. */ /* returns negative value on error, 0 when settings unchanged from args, 1 when changed */ -static int setup_from_args(til_args_t *args, setup_t *res_setup) +/* on error, *res_failed_desc _may_ be assigned with something useful. */ +static int setup_from_args(til_args_t *args, setup_t *res_setup, const til_setting_desc_t **res_failed_desc) { int r = -ENOMEM, changes = 0; setup_t setup = {}; @@ -133,13 +134,13 @@ static int setup_from_args(til_args_t *args, setup_t *res_setup) if (!setup.video) goto _err; - r = setup_interactively(setup.module, til_module_setup, args->use_defaults, &setup.module_setup); + r = setup_interactively(setup.module, til_module_setup, args->use_defaults, &setup.module_setup, res_failed_desc); if (r < 0) goto _err; if (r) changes = 1; - r = setup_interactively(setup.video, setup_video, args->use_defaults, &setup.video_setup); + r = setup_interactively(setup.video, setup_video, args->use_defaults, &setup.video_setup, res_failed_desc); if (r < 0) goto _err; if (r) @@ -242,9 +243,10 @@ static void * rototiller_thread(void *_rt) */ int main(int argc, const char *argv[]) { - setup_t setup = {}; - til_args_t args = {}; - int r; + const til_setting_desc_t *failed_desc = NULL; + setup_t setup = {}; + til_args_t args = {}; + int r; exit_if((r = til_init()) < 0, "unable to initialize libtil: %s", strerror(-r)); @@ -255,8 +257,12 @@ int main(int argc, const char *argv[]) if (args.help) return print_help() < 0 ? EXIT_FAILURE : EXIT_SUCCESS; - exit_if((r = setup_from_args(&args, &setup)) < 0, - "unable to setup: %s", strerror(-r)); + exit_if((r = setup_from_args(&args, &setup, &failed_desc)) < 0, + "unable to use args%s%s%s: %s", + failed_desc ? " for setting \"" : "", + failed_desc ? failed_desc->key : "", + failed_desc ? "\"" : "", + strerror(-r)); exit_if(!args.gogogo && r && print_setup_as_args(&setup) < 0, "unable to print setup"); -- cgit v1.2.1